Description This dataset contains the experimental data from a study investigating the impact of Spring Boot framework versions and Java Virtual Machine (JVM) versions on energy consumption. The measurements were collected using JoularJX to monitor power consumption across multiple versions of Spring Boot (3.0.13, 3.1.12, 3.2.12, 3.3.7, and 3.4.1) and three JVM versions (17.0.13-tem, 21.0.5-tem, and 23.0.1-tem) on three different hardware platforms (Intel Xeon, AMD Ryzen, and Apple M1). Dataset Contents Raw Measurements: CSV files containing energy consumption data measured in Joules for each combination of Spring Boot version, JVM version, and hardware platform. All raw Spring Boot, JMeter and JoularJX logfiles are also included in the dataset. Benchmark Scripts: Shell scripts used to automate the benchmark process Statistical Analysis: R scripts used for data cleaning, statistical analysis, and visualization JMeter Test Plans: Test plan files that define the API operations executed against the Spring Petclinic REST application Database Setup: Initial database population scripts for MySQL Configuration Files: JoularJX configuration Readme: Setup instructions for running the scripts and preparing the environment (Linux, macOS). The benchmark scripts, JMeter test plans, database setup and configuration files that were used to produce the data is also available on GitHub. Experimental Setup The experiments were performed on: Intel Xeon CPU E3-1231 v3 @ 3.40GHz with 32 GB RAM (Scaleway EM-A115X-SSD) AMD Ryzen PRO 3600 6C/12T 3.6 GHz with 32 GB RAM (Scaleway EM-A610R-NVME) Apple M1 with 8 cores and 8 GB RAM (Mac mini) Each configuration was tested with 100 iterations using JoularJX for energy measurements. The benchmark simulated user interactions with the Spring Petclinic REST API, executing 5500 GET requests and 6000 POST/PUT/DELETE requests per test run.